Their really is some outrageous mistakes, not the peoples but EPA. To this day, my own humble example is the carbed 3 main subarus, as by far the most extremely wrongly written cars ever. It goes along with the cars sabotaged history, but is defending others who have real mileage over doubled EPA...with no mods. It is not common, but does happen. the 3cyl GEO is yet another one, (the carbed one). I am one with nearly no mods but to make it todays standard. (No crazy extras)...and it doubles epa all the time 23 years later...original...
It would be to take on a bigger picture and realize, all the high mpgers are extincted in production...and written wrongfully by EPA simultaneous. Capitalist beware..there is 200 million people on to your boardrooms...